7u^2-56=0

Solution for 7u^2-56=0 equation:

Simplifying
7u2 + -56 = 0

Reorder the terms:
-56 + 7u2 = 0

Solving
-56 + 7u2 = 0

Solving for variable 'u'.

Move all terms containing u to the left, all other terms to the right.

Add '56' to each side of the equation.
-56 + 56 + 7u2 = 0 + 56

Combine like terms: -56 + 56 = 0
0 + 7u2 = 0 + 56
7u2 = 0 + 56

Combine like terms: 0 + 56 = 56
7u2 = 56

Divide each side by '7'.
u2 = 8

Simplifying
u2 = 8

Take the square root of each side:
u = {-2.828427125, 2.828427125}